Question 1

The best evidence of toxoplasmosis infection is a significant change in:

Accepted Answer

A)   two appropriately timed specimens.
B)   acute and convalescent specimens.
C)   two appropriate specimens analyzed at the same time in the laboratory.
D)   all of the above.E) None of the above
F) C) and D)

Question 2

After IgM-positive sera undergo confirmatory testing,the results are interpreted as a(n) :

Accepted Answer

A)   recently acquired infection.
B)   infection acquired in the past.
C)   false-positive test result.
D)   all of the above.E) A) and D)
F) A) and C) D

Question 3

The preferred method for detection of T.gondii is:

Accepted Answer

A)   culture.
B)   ELISA.
C)   IFA.
D)   PCR.E) C) and D)
F) A) and B) B

Question 4

Toxoplasma gondii antibody assay can demonstrate antibodies within __________ after infection.

Accepted Answer

A)   2 days
B)   1 week
C)   2 weeks
D)   1 monthE) All of the above
F) C) and D)

Question 5

Any positive result in a pregnant patient confirmed as positive by a second reference laboratory should be evaluated by:

Accepted Answer

A)   amniocentesis testing by PCR for T.gondii.
B)   IgM,IgA,and IgE ELISAs.
C)   Sabin-Feldman dye test (IgG) .
D)   IgE immunosorbent agglutination assay.E) None of the above
F) A) and B)

Question 6

All mammals can transmit T.gondii by:

Accepted Answer

A)   casual contact.
B)   transplacental transmission.
C)   sexual contact.
D)   none of the above.E) B) and C)
F) A) and C)

Question 7

Toxoplasma-infected mothers who are not treated can give birth to a(n) :

Accepted Answer

A)   less than term infant.
B)   underweight infant.
C)   congenitally infected infant.
D)   normal,healthy infant.E) A) and C)
F) C) and D)

Question 8

Major sources of increasing human infection with T.gondii include all the following except:

Accepted Answer

A)   fecal contamination of food with the T.gondii organism.
B)   infected meat.
C)   bloody body fluids.
D)   raw infected milk.E) All of the above
F) A) and B)

Question 9

Congenital toxoplasmosis can result in:

Accepted Answer

A)   central nervous system (CNS) malformation.
B)   prenatal mortality.
C)   congenital heart defects.
D)   both a and bE) A) and B)
F) C) and D)

Question 10

The Centers for Disease Control and Prevention (CDC) suggests that any confirmed equivocal or ____________ test results for toxoplasmosis should be retested using a different assay.

Accepted Answer

A)   positive
B)   negative
C)   questionable
D)   prenatalE) All of the above
F) A) and B)

Question 11

The PCR assay for T.gondii can be performed on:

Accepted Answer

A)   serum or plasma.
B)   fresh or frozen biopsy tissue.
C)   cerebrospinal fluid.
D)   all of the above.E) A) and B)
F) B) and C)

Question 12

The definitive host of Toxoplasma gondii is the:

Accepted Answer

A)   dog.
B)   house cat.
C)   chicken.
D)   rodent class.E) A) and C)
F) None of the above

Question 13

IgM antibodies to T.gondii in an adult are an indication of:

Accepted Answer

A)   current or recent infection.
B)   chronic infection.
C)   past infection.
D)   antibody transmitted from another person.E) C) and D)
F) None of the above

Question 14

The avidity result is determined using:

Accepted Answer

A)   ratios of antibody titration curves of urea-treated and untreated sera.
B)   titers of antibody in preinfection and postinfection specimens.
C)   amniotic fluid versus serum.
D)   both b and cE) None of the above
F) A) and B)

Question 15

Transfusion-transmitted toxoplasmosis is associated with:

Accepted Answer

A)   packed red blood cells.
B)   platelet concentrates.
C)   leukocyte concentrates.
D)   either b or cE) B) and D)
F) None of the above

Question 16

Symptoms of acquired T.gondii infection can:

Accepted Answer

A)   be mild.
B)   resemble infectious mononucleosis.
C)   cause a urinary tract infection.
D)   both a and bE) B) and D)
F) All of the above D

Exam 20: Toxoplasmosis

The best evidence of toxoplasmosis infection is a significant change in:

Correct Answer
verified

After IgM-positive sera undergo confirmatory testing,the results are interpreted as a(n) :

Correct Answer
verified
D

The preferred method for detection of T.gondii is:

Correct Answer
verified
B

Toxoplasma gondii antibody assay can demonstrate antibodies within __________ after infection.

Correct Answer
verified

Any positive result in a pregnant patient confirmed as positive by a second reference laboratory should be evaluated by:

Correct Answer
verified

All mammals can transmit T.gondii by:

Correct Answer
verified

Toxoplasma-infected mothers who are not treated can give birth to a(n) :

Correct Answer
verified

Major sources of increasing human infection with T.gondii include all the following except:

Correct Answer
verified

Congenital toxoplasmosis can result in:

Correct Answer
verified

The Centers for Disease Control and Prevention (CDC) suggests that any confirmed equivocal or ____________ test results for toxoplasmosis should be retested using a different assay.

Correct Answer
verified

The PCR assay for T.gondii can be performed on:

Correct Answer
verified

The definitive host of Toxoplasma gondii is the:

Correct Answer
verified

IgM antibodies to T.gondii in an adult are an indication of:

Correct Answer
verified

The avidity result is determined using:

Correct Answer
verified

Transfusion-transmitted toxoplasmosis is associated with:

Correct Answer
verified

Symptoms of acquired T.gondii infection can:

Correct Answer
verified
D

Exam 20: Toxoplasmosis

The best evidence of toxoplasmosis infection is a significant change in:

Correct AnswerverifiedShow Answer

After IgM-positive sera undergo confirmatory testing,the results are interpreted as a(n) :

Correct AnswerverifiedD

The preferred method for detection of T.gondii is:

Correct AnswerverifiedB

Toxoplasma gondii antibody assay can demonstrate antibodies within __________ after infection.

Correct AnswerverifiedShow Answer

Any positive result in a pregnant patient confirmed as positive by a second reference laboratory should be evaluated by:

Correct AnswerverifiedShow Answer

All mammals can transmit T.gondii by:

Correct AnswerverifiedShow Answer

Toxoplasma-infected mothers who are not treated can give birth to a(n) :

Correct AnswerverifiedShow Answer

Major sources of increasing human infection with T.gondii include all the following except:

Correct AnswerverifiedShow Answer

Congenital toxoplasmosis can result in:

Correct AnswerverifiedShow Answer

The Centers for Disease Control and Prevention (CDC) suggests that any confirmed equivocal or ____________ test results for toxoplasmosis should be retested using a different assay.

Correct AnswerverifiedShow Answer

The PCR assay for T.gondii can be performed on:

Correct AnswerverifiedShow Answer

The definitive host of Toxoplasma gondii is the:

Correct AnswerverifiedShow Answer

IgM antibodies to T.gondii in an adult are an indication of:

Correct AnswerverifiedShow Answer

The avidity result is determined using:

Correct AnswerverifiedShow Answer

Transfusion-transmitted toxoplasmosis is associated with:

Correct AnswerverifiedShow Answer

Symptoms of acquired T.gondii infection can:

Correct AnswerverifiedD

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D

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B

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D